Adjustable brake-head.



L. PORTER & G. H. WILLI AMS, JR. ADJUSTABLE BRAKE HEAD. APPLICATIONFILED JAR. 12,1910. I

' Patented ma 31, 1910.

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LEMULL. POE

TEE I umfzf UNITED STATES PATENT OFFICE.-

LEMUEL PORTER AND CHARLES H. WILLIAMS, JR., OF CHICAGO, ILLINOIS,ASSIGNORS TO CHICAGO RAILWAY EQUIPMENT COMPANY, OF CHICAGO, ILLINOIS, ACORPORA- TION OF ILLINOIS.

ADJUSTABLE BRAKE-HEAD.

Specification of Letters Patent.

Patented May 31, 1910.

To all whom it may concern:

Be it known that we, LEMUEL PORTER and CHARLES H. IVILLIAMS, Jr.,citizens of the United States, residing at Chicago, Illinois, haveinvented a certain new and useful I1n provement in AdjustableBrake-Heads, of which the following is a full, clear, and exactdescription, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, forming part of this specification, in whichFigure 1 is an elevational View, partly in section, of my improvedadjustable brake head. Fig. 2 is a similar view of a modified form of abrake head.

This invention relates to a new and useful improvement in adjustablebrake heads, the object being to construct a head which will be held inthe position to which it is adjusted upon application of the brakes.

In our present invention we have shown a locking-block which is carriedby the brake head and which cocperates with the part on which the brakehead is mounted, said block being pressed outwardly by a spring arrangedoutside of the brake head and 00- operating with a serrated face withinthe part of the brake beam on which the brake head is mounted.

In the drawings 1 indicates the thrust .block or sleeve being a part ofthe brake beam on which the brake head 2 is mounted. This sleeve isprovided with a recess 1 for receiving the locking-block 3 the face ofsaid recess being preferably corrugated or serrated as at 1", but itisobvious that these serrations may be omit-ted if desired and the headheld in position by the friction of cooperating plain faces.

1 is a slot in the part of the brake beam on which the head is mounted,said slot be ing circumferentially disposed and through which extends abolt or shank 3 carrying a locking-block 3 at its inner end. This boltpasses freely through an opening in the brake head and is provided witha nut or shoulder 4: at its outer end, between which and the brake headis a coil spring 5. This spring presses the locking-block outwardly andclamps a part of the brake beam therebetween and the wall of the socketof the brake head. Tension on the locking-block may be adjusted byscrewing of the nut 4.

In Fig. 2 we have shown a modified form in which the locking-block isprovided with a plain face and the part of the brake beam on which it ismounted is provided with a corrugated face 1 said corrugated facecooperating with a corresponding face 2 on the brake head. The part ofthe brake beam which is clamped between the locking-block and the brakehead, holds the brake head in its adjusted position.

e claim:

1. The combination of an adjustable brake head, a part of the brake beamon which the same is mounted, and means carried by the brake head andexerting outward pressure on the part of the brake beam to clamp thesame against the brake head to hold said head in adjusted posit-ion.

2. The combination of a brake head, a part of the brake beam on whichthe same is mounted, said brake beam part being recessed, alocking-block arranged in said recess and means for exerting yieldingpressure against said locking-block to force the same outwardly wherebya part of the brake beam on which the head is mounted is plainpeclbetween said locking block and said ieac.

3. The combination of a brake head, a part of the brake beam on whichthe same is mounted, said part having a recess and a circumferentialslot, a locking-block operating in said recess and having a stem or boltextending outwardly through said slot and through the brake head, and aspring cooperating with the outer end of said stem or bolt.

4. The combination of a brake head, a part of the brake beam on whichthe same is mounted, said part having a recess and a circumferentialslot, a locking-block operating in said recess and having a stem or boltextending outwardly through said slot and through the brake head, and aspring arranged upon the outer end of said stem or bolt and means forregulating the compression of said spring.

In testimony whereof we hereunto affix our signatures in the presence oftwo witnesses, this 8th day of January, 1910.

LEMUEL PORTER. CHARLES H. WILLIAMS, J R.

Witnesses EDWARD T. WALKER, J. W. WEINLANDS.

